My external network interface on a gentoo box will produce these errors intermittently (maybe 3-4 a week). It is hooked up to Optimum online, and gets its IP via DHCP. It's always-on, and it almost never loses connection (when it does usually I or one of my roommates notices it).
>
eth1: failed to renew, attempting to rebind
I'm trying to understand what might produce these errors.
Qu'est-ce que DHCP Rebinding?
Re: Qu'est-ce que DHCP Rebinding?
When a DHCP lease expires, the DHCP client attempts a renewal - it contacts the original leasing DHCP server, requests a new lease, and if everything goes well it gets one and goes merrily on it's way.
After a period of time, if it doesn't get a response, or it keeps getting negative responses from the original server, it attempts to rebind.
This is essentially the same process as it uses on power-up when it's first requesting a DHCP lease - it sends out a broadcast asking for DHCP servers, and binds to the server that responds positively.
If you keep getting these messages it can indicate a DHCP server misconfiguration, an overloaded DHCP server, or a short timeout period in your DHCP client for the renewing process.
You can get more detailed information at the [TCP/IP guide](http://www.tcpipguide.com/free/t_DHCPLeaseRenewalandRebindingProcesses-2.htm).
-Adam
After a period of time, if it doesn't get a response, or it keeps getting negative responses from the original server, it attempts to rebind.
This is essentially the same process as it uses on power-up when it's first requesting a DHCP lease - it sends out a broadcast asking for DHCP servers, and binds to the server that responds positively.
If you keep getting these messages it can indicate a DHCP server misconfiguration, an overloaded DHCP server, or a short timeout period in your DHCP client for the renewing process.
You can get more detailed information at the [TCP/IP guide](http://www.tcpipguide.com/free/t_DHCPLeaseRenewalandRebindingProcesses-2.htm).
-Adam